Window fastener



A. F. LAGERSTROM July 24, 1923.

WINDOW FASTENER Filed Oct. 6. 1921 Il 171?A Patented July 214, 1923.

UNITED STATES `ASN'IHONY F. LAGERSTROM, OF CHICAGO, ILLINOIS.

WINDOW FASTENER.

Application lcd October G, 1921.

y To all whom #may concern Be it known that I, ANTHONY F. LAGER- srRoM, a citizen of the United States, and a lresident of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement/in Window Fasteners, of which the following is a full, clear, i

and exact description.

My invention relates to improvements in window fasteners, and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of my invention is to provide a device of the character described which will enable the locking of a pair of slidably mounted window sashes relative to one another at will.

A further object of my invention is to provide a device of the character described which may be secured in an unlocked position, thus obviating the accidental engage'- ment of the lock in raising or lowering the sash.

A further object of my invention is to provide a device of the character described having a cam roller for frictionally engaging a window sash, thus providing an automatic taking up of wear on the roller.

A further object of my invention is to provide a device extremely simple in construction, thoroughly practical commercially, and which may be easily applied to any ordinary window sash.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming partv of this application, in which- Figure 1 is a fragmentary view of a window sash with ,the device operatively aplied P Figure 2 is a side elevation of the device in unlocked position, and

Figure 3 is an end elevation of the device.

In carrying out my invention,Imake use of a standard window frame 1 having guide strips 2 in which window sashes 3 and 3 are slidably mounted. The window sashes 3 and 3" are of the common type and carry panes of glass 4.

I secure to the upper surface of the sash 3 by means of screws 5 and 6 a metal plate 7 having a downwardly extending flange 8, which flange is bent to conform with the Serial No. 505,859.

slightly beveled surface of the side 9 on the sash 3. To admit the flange 8 I chisel a shallow recess 10 in the side 9 of the sash which permits the close engagement of the sashes 3 and 3.

rIhe plate 7 is provided with two oppositely disposed upwardly extending wings 11 and 12 having holes centrally located therein for the reception of a bolt 13. The bolt 13 has rotatably mounted thereon a cam roller 14 of wood or other suitable material. A nut 15 is provided to secure the bolt 13 fr oin slipping out of engagement with the wings.

The wings 11 and 12 have, adjacent the plate 7 and close to the flange 8 small openings 16. A spring member 17 is secured at its extremities through the openings 16 and is of substantially U-shape. The closed end of the spring member 17 is bent back toward the roller 14 substantially as shown in Figure 2, thus forming a resilient holding means for the cam 14 when in the position shown in Figure 2.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. In using the device, which is normally in the position shown in Figure 2 when not in use, the cam 14 is disengaged from the spring 17 and manually rotated to the position shown in Figure 1. It should be noted at this time that the point on the surface of the cam 14 which is most distant from the bolt 13 is slightly above the plane in which the cam rotates, that is, the plane in which the bolt 13 lies. When an attempt is made to move the sash 3. upwardly or the sash 3 downwardly, the cam 14, having frictional engag-ement with the surface 18 of the sash 3, will be pressed in close engagement thereto sufhcient to cause the locking of the sashes 3 and 3 relative to one another. This locking of the sashes with one another will occur whenever the cam 14 is turned in the position shown in Figure 1, regardless of the positions the sashes happen to be in on the window frame 1.

It will be readily seen that a movement of either of the sashes away from the other would not in any way affect an engagement with the cam roller 14 to lock the sashes relative to one another. The window can thus be closed without disengaging the cam roller from its slidable engagement against the sash 3.

When not in use` the cam 14 is securely held in inoperative position by means of the spring U-shaped member 17.

1. The combnationwth a pair of Windonr sashes arranged to slide relative toene another7 of a stationary shaft carried by one of said sashes, a cam roller rotatably monnted on said shaft, said cam roller being adapted, at will, to closely engage one of `said sashes when either of said sashes are' moved `toward one another,` and means for locking ably `grip said roller when said roller is turned back ont of engagement with the sash, whereby said Sashes may be moved relative `to one another.-

Q. A device of theV character described comprising` a plate having a laterally bent portion at one end thereof and opening from said plate adjacent' each end thereof, said plate having two oppositely disposed upwardly extending Wings, a shaft carried by Said'ivings, a cam roller rotatably mounted on `said shaft, 'and 'means' for yieldably grippingsaidroller to retafin'the" roller in-an inoperative position.

ANTHONY F.

interner-ROM; 

